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Seiyosha

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A small publishing company in Yokohama, Japan, known for local area books.

Last updated September 1, 2026

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Nov 4, 2026
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Nov 4, 2026

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Overview

Seiyosha is a small Japanese publishing company established in August 2013 in Isezakicho, Naka Ward, Yokohama, with the main business purpose of 'production, writing, editing, and publication of information media.' It publishes local area books centered on the Yokohama regional book 'Hamataro'.

History

Seiyosha was established in August 2013 in Isezakicho, Naka Ward, Yokohama, as a small company of only two family members. Its main business purpose is 'production, writing, editing, and publication of information media.' It publishes local area books centered on the Yokohama regional book 'Hamataro'.

Sources4 sources

  1. 1横浜のふたり出版社「星羊社」seiyosha.net
  2. 2会社概要 | seiyoshaseiyosha.net
  3. 3physical shop | seiyoshaseiyosha.net
  4. 4Seiyoshawikidata.org

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